2 AICI3 + 3 Ca - 3 CaCl2 + 2 Al You react aluminum chloride with calcium metal. You want to produce 40.00 grams of aluminum. How many grams of calcium do you need?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.